Tungsten (W) is a very unique metal that is widely used in industry and high technology due to its excellent physical properties.
Basic properties
Chemical symbol: W Atomic number: 74 Density: 19.25 g/cm³, one of the metals with very high density. Melting point: 3422°C, tungsten has the highest melting point of all metals. Hardness: tungsten is very hard, especially after alloying. Color: silver-white or gray metallic luster
Physical properties
Extremely high melting and boiling points: tungsten's melting point is as high as 3422°C and boiling point is 5555°C, making it one of the most important metals in high temperature resistant materials. Low coefficient of thermal expansion: tungsten has a low coefficient of thermal expansion, so it has little deformation and high dimensional stability under high temperature conditions. Electrical and thermal conductivity: tungsten has good electrical conductivity, suitable for use as an electrode material, and its thermal conductivity is also higher among the metals.
Mechanical properties
High tensile strength: tungsten's mechanical strength and rigidity are very good, especially at high temperatures can still maintain strength. Excellent wear resistance: Due to its high hardness and high strength, tungsten excels in wear resistance and is suitable for environments that require wear and corrosion resistance.
Chemical properties
Stability: Tungsten is very stable to oxygen, acids and alkalis at room temperature, but reacts with oxygen to form tungsten oxide at high temperatures. Alloying: Tungsten can form alloys with other metals (e.g. nickel, iron, cobalt, etc.) to enhance its performance in high temperature and high strength environments.
Production and Refining
Tungsten is mainly extracted from scheelite (WO₃), which is first subjected to a series of chemical reactions to obtain ammonium tungstate, and then reduced to tungsten powder. Tungsten powder is pressed and sintered to produce high-density tungsten products. Tungsten products are usually processed by powder metallurgy because tungsten has a very high melting point and is not easy to melt and cast.
Main applications
High-temperature applications: The high melting point of tungsten makes it suitable for the manufacture of high-temperature resistive materials, electric heating wires, lamp filaments and other high-temperature devices. Electrode materials: tungsten is used in electrodes for arc welding and electric discharge machining because of its high temperature resistance and good electrical conductivity. Tungsten alloy: The strength and density of tungsten make it used in aerospace and military industries to make high-density alloys (e.g., armor-piercing bullets, balanced weights, etc.). Electronic components: Due to its electrical conductivity and thermal stability, tungsten is widely used in the manufacture of semiconductors and electronic components.
tungsten periodic table
Tungsten has the chemical symbol W, atomic number 74, and belongs to the transition metals in Period 6, Group 6.
density of tungsten
With a density of 19.25 g/cm³, tungsten is one of the very dense metals.
melting point of tungsten
With a melting point of 3422°C (6192°F), tungsten has the highest melting point of any metal.
chemical symbol for tungsten
The chemical symbol for tungsten is W.
hardness of tungsten
With a Vickers hardness of approximately 3430 MPa, tungsten is extremely hard.
is tungsten conductive
Yes, tungsten has good electrical conductivity.
how is tungsten made
Tungsten is usually refined from scheelite (WO₃), reduced and sintered to tungsten powder, which is then pressed and sintered at high temperatures to form solid tungsten products.
mechanical properties of tungsten
Tungsten has high strength, very high hardness, excellent wear resistance and tensile strength, and still maintains good mechanical properties at high temperatures.
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